Murder would have been the better term to use.
Jesus NEVER gave the church the right, authority, or power to kill, or murder, anyone.
While the government does have the right to execute justice, and a person can use force even to the point of being deadly, to defend himself.
Killing in the name of religion is MURDER, and does not depend on who they are or were.
Your post is illogical. Kill /= murder, and yet you combine the terms with an "or." Murder is always wrong. From whom did Peter, Paul, and Elijah get the right, authority, and power to kill ? Do you hold they are not part of the church, or are you asserting on behalf of the entire church (in which case you would only be correct until Messiah returns, which will apparently result in some killing. 14And Enoch also, the seventh from Adam, prophesied of these, saying, Behold, the Lord cometh with ten thousands of his saints, 15To execute judgment upon all, and to convince all that are ungodly among them of all their ungodly deeds which they have ungodly committed, and of all their hard speeches which ungodly sinners have spoken against him.
Jude